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Java Engineer - Online Payment Platform (Consumer & Merchant)

東京23区 派遣社員 時給 3,000円 - 5,000円 外資系企業 求人詳細を見る
This mid-level Java Engineer role sits in the online payments development team, building high-performance, highly available systems for both consumers and merchants. You will work across multiple services, from checkout flows and merchant APIs to data platforms and onboarding tools, in a highly collaborative engineering environment.
  • Shape high-scale payment services used by leading e-commerce brands
  • Develop with modern Java stack while growing in a major fintech group

企業情報

Our client is a leading Japanese fintech company within a major internet group, providing one of the largest online payment platforms for e-commerce merchants across Japan. Their services support thousands of online stores nationwide, and the online payment business is a core pillar in the group's growth strategy.

職務内容

As a mid-level engineer, you will join an experienced development team responsible for mission-critical online payment systems. Your main responsibilities will include:

  • Designing, developing and maintaining Java-based web applications for online payments
  • Building and improving high-performance, highly available systems for:
    • Consumer-facing payment flows
    • Merchant-facing API services
    • Merchant management and back-office systems
    • Large-scale payment data aggregation systems
    • New merchant onboarding and application systems
  • Writing clean, maintainable code and contributing to code reviews and design discussions
  • Working closely with product managers, QA and operations teams to deliver secure, stable, and scalable services
  • Proactively identifying issues, proposing solutions, and driving continuous improvement in performance, efficiency and reliability
  • Ensuring compliance with global security standards (e.g. PCI DSS) in collaboration with relevant stakeholders

理想の人材

The ideal candidate will have the following experience and skills:
Must-have:

  • 3+ years of hands-on experience in Java web application development
  • Practical experience in application development using SQL (1+ year)
  • 2+ years of experience developing consumer-facing web applications
  • Basic knowledge and experience with Linux/Unix environments
  • Strong communication skills and the ability to build trustful relationships within the team
  • Ability to make sound judgments and constructive proposals based on the situation
  • Proactive, self-driven mindset with a strong sense of ownership
  • Intention and motivation to convert to a permanent employee in the mid to long term (not guaranteed but expected path)
  • Language:
    • Native or fluent Japanese
    • Daily conversational level English (around TOEIC 600 or equivalent is preferred)

Nice-to-have:

  • Experience operating Apache and Tomcat
  • Experience with frameworks such as Struts and Spring
  • Front-end skills using HTML, CSS, and JavaScript for web UI development
  • Experience with public cloud services, Kubernetes, and Docker
  • Experience using Git, Jenkins, and Maven in a modern development workflow
  • Knowledge of, or strong interest in, payment services and financial systems

条件・待遇

  • Opportunity to contribute to a high-impact online payment platform used by thousands of e-commerce merchants across Japan
  • Exposure to large-scale, high-availability systems and global security standards such as PCI DSS
  • A collaborative engineering culture that values ownership, problem-solving, and continuous improvement
  • Clear career development opportunities, including the potential path to permanent employment (conversion not guaranteed)
  • Bilingual environment where you can leverage and further strengthen both Japanese and English skills
  • Stable yet innovative environment as part of a major internet/fintech group



コンタクト
Serena Wu
求人番号
JN-022026-6941248
電話
+81 3 6627 6137

求人情報

分野
IT
職種
プログラミング＆開発
業界
IT・通信
勤務地
東京23区
雇用形態
派遣社員
担当コンサルタント
Serena Wu
担当コンサルタントの電話番号
+81 3 6627 6137
求人番号
JN-022026-6941248
企業タイプ
外資系企業

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